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Ldb %sp,%ba – Epson S1C63000 User Manual

Page 117

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S1C63000 CORE CPU MANUAL

EPSON

111

CHAPTER 4: INSTRUCTION SET

LDB %sp,%BA

Load BA reg. into stack pointer

1 cycle

Function:

sp

BA

Loads the content of the BA register into the stack pointer sp (SP1 or SP2).

Code:

Mnemonic

MSB

LSB

LDB %SP1,%BA

1

1

1

1

1

1

1

0

0

0

1

0

X

1FC4H, (1FC5H)

LDB %SP2,%BA

1

1

1

1

1

1

1

0

0

0

1

1

X

1FC6H, (1FC7H)

Flags:

E

I

C

Z

Mode:

Src: Register direct
Dst: Register direct
Extended addressing: Invalid

NOP

No operation

1 cycle

Function:

No operation (PC

PC+1)

Expends 1 cycle without doing an operation that otherwise exerts an affect. The PC (program
counter) is incremented.

Code:

Mnemonic

MSB

LSB

NOP

1

1

1

1

1

1

1

1

1

1

1

1

X

1FFEH, (1FFFH)

Flags:

E

I

C

Z